@Journal{DBLP:journals/ivs/KeimNPS03,
   title = {Visualizing geographic information: VisualPoints vs. CartoDraw},
   author = {Daniel A. Keim and Stephen C. North and Christian Panse and J{\"o}rn Schneidewind},
   year = 2003,
   Journal = {Information Visualization},
   Volume = 2,
   Number = 1,
   Pages = {58-67}
}